Write in C# programming language and will accept a number as input. The loops are used to build some pattern of *.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace piramid


{
  class Program


{
 static void Main(string[] args)


{
  Console.Write("Enter a number: ");

int n = Convert.ToInt32(Console.ReadLine());

Console.WriteLine();

for (int i = n; i > 1; i--)



{
  for (int j = 1; j <= i; j++)

Console.Write("*");

Console.WriteLine();



}
  for (int i = 0; i <= n; i++)



{
  for (int j = 1; j <= i; j++)

Console.Write("*");

Console.WriteLine();



}
  Console.WriteLine();

for (int i = 1; i < n; i++)



{
  for (int j = 1; j <= i; j++)

Console.Write(j.ToString());

Console.WriteLine();



}
  for (int i = n; i >= 0; i--)



{
  for (int j = 1; j <= i; j++)

Console.Write(j.ToString());

Console.WriteLine();



}
  Console.WriteLine();

Console.ReadLine();



}

}

}
 OUTPUT: